*From:* Charles Lepple [mailto:[email protected]]
*To:* Mike Dillinger <[email protected]>
*Cc:* [email protected]
*Date:* Monday, June 22, 2020, 5:19 AM PDT
*Subject:* [Nut-upsuser] Low Battery Problems
I’d recommend a battery test. Starting the test via the front panel should be
sufficient, or you might be able to do it with upscmd.
This should let the UPS firmware discharge the battery a bit, and see how long
it should last.
Conceptually, “OL LB” is not inconsistent- it means the UPS has AC power, but
the battery state of charge is reading low (as might happen after the UPS
restarts after an extended power failure) . You might have a CPS unit where the
battery voltage returned to NUT is hard-coded to 24.0 V, which is annoying, but
should not affect internal decisions about shutdown. Example:
https://networkupstools.org/ddl/Cyber_Power_Systems/CP1500PFCLCD.html and
https://github.com/networkupstools/nut/issues/459#issuecomment-325163688
Thanks for the information. I did initiate a deep test and it finished
successfully.
I spent a fair amount of time look at this issue this weekend and ended up lowering
override.battery.charge.low from 60 to 40 and the problem went away. I haven't had any
of the "OL LB" warnings since changing that threshold which has not been the
case for a while now. I think I'll try bumping override.battery.charge.low back up to 60
after running the test that you suggested and see how that works out.
Thanks again!
-MikeD
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